Ekntst dietrich



Patented June 2, 1931 UNITED STATES PATENT OFFICE ERNST DIETRICH, OF ALTENIBURG, GERMANY roam iron. MULTIPLE rrmcnme mcnmns Application filed May *28, 1929, Serial No. 866592, and in Germany June 1, 1828.

to overcome this difliculty and to this ,end

I provide in combination with a set of plungers each of which has a guiding bush inserted in a recess of the turret, clips for holding the bushes in their recesses which '15 clips are detachably secured to the turret;

and stops on the turret for locating the 7 bushes by entering a recess in each bush.

The clips are readily detached for releasing any bush whichinterferes with the free rotation of the turret, and the bush comes oflf its stop as readily.

It is another objectof my invention to provide means for securing the plungers in their bushes. To this end I provide a'sprin'g catch in each stop which is adapted to enter a depression or recess in the plunger.

. In the drawing affixed to this specification and forming part thereof a turret head embodying my invention is illustrated diagrammatically by way of example.

In the drawing:

Fig. 1 is an elevatlon showing part of the upper disc of 'a. turret head, with three substantially -U-shaped as shown in Figs. 9

plunger and stripper units-therein, Fig.2 is a section taken through the axis 31? one of the units, and part of the turret so, Fig. 3 is a plan view showing the three units illustrated in Fig. 1,'in plan view, Fig. 4 is an elevation showing. Part of the lower disc of the head, with one of the dies,

Fig. 5 is a plan .vi'ew of the die,

Fig. 6 is a section on .the line 6-6 in Fig. 4, and

Fig. 7 is an .chine. y

Figs. 8 to .10 illustrate on a smaller scale various positions of the means for reciprocating the plungers, more partlcularly,

Fig. 8 is an elevation showing one of the 5 elevation of the compldte maflanges entering'into the grooves 15.

plungers about to enter-into operative connection with the reciprocating means,

Figs. 9 and 10 are end elevations viewed from the right in Fig. 8 and showing the reciprocating means elevated and. lowered, respectively, and

Fig. 11 is a section on the line 1111 in Fig. 8." v

, Referring first to Fig, 7, 5, 5a are the'p'arallel upper and lower parts ofa machine frame, 4 is a pin secured in the frame, 3 is a boss fitted to rotate on the pin 4, 1 is the upper disc su porting the plunger-and-stripper I units, 7, 8, and 2 is the lower disc supporting the dies 19. The parts 1, 2 and 3'make upthe turret of the machine, and 14 is the usual t anually operated lever at the, punching sta- Referring now to Fig. 1, 2 and 3, 6 are re-" cesses in the perimeter of the upper disc 1 of the turret, 7 are bushes inserted in the recesses, 12 are clips adapted to engage. the bushes7 on the outside, and 13 are screws for holding down the clips on the bushes 7. 8 is a plunger which is fitted. to slide in each bush 7, and is engaged by the reciprocating means illustrated in Figs. 8 to 11, 18 is a punch at the lower end of the plunger, 15 is a cirer, 26 is a rod which is fitted to slide in the frame'5, 5a under the control of the usual lever 14 and a cam, not shown, and 24 is-a jaw at the lower end of\the rod 26 which is "with respect to the circular path along whic the plungers rotate, bodily about the axis of cular groove at the upper-endof each plungthe pin'4, and is provided with inwardlypro- -jectin fiangesat its lower end, a clearance 25 be ng'left between the flanges. It will. appear that as the'plungers arrive in suclever .14, their heads are engaged b the en a plunger has entered the jaw'as shown in.

Fig. 9, the rod 26 is lowered by means of the cession at the punching station below the lever 14 as shown in Fig. 10 so that the lower end of the lunger descends upon the cone- .spondin d1e'19.'

- Each ush is recessed atthe topfor the reception of a stop plate which is secured on the upper disc 1 b means of a screw 11. By these means the bush is located in its recess'axially and circumferentially. 16 is a catch which is fitted to slide in each plate against the action of a spring 17 and adapted to enter a recess in the plunger 8 so that the plungers and bushes are held in a given positionwith respect to the upper disc 1, and their upper, ends, with the grooves 15, are at the same level.

Referring now to Figs. 4, 5 and 6, means are provided for aligning the dies 19 in the lower disc 2 exactly with respect to the corresponding plungers. The dies are provided with reduced extensions 20 at their lower ends, which fit with some clearance in holes provided for them in the 'lower disc 2. Each extension has a circular groove adapted to be entered by oppositely tapered pins 21 and 22, as best seen in Fig. 6. 23 are threads of opposite hands at the ends of the pins which engage female threads in the disc 2. The

threaded ends 23 are slotted for the attack of a screw driver so that they will be displaced axially by being rotated, and in this manner smaller or larger radii of the pins are brought to bear'on the die, causing a cor- Eesponding transverse displacement of the It will be understood from this description that when difiiculties of the kind referred to are encountered, for'instance, if a plunger is obstructed, by a projectin part of the article so that the plunger whic has been operated at the punching station, could not move on, the obstructed plunger is readil removed by unscrewing its screw 13. Obviously, the upper ends of the plungers must be at the same level in order to be properly engaged by the jaw 24, as described, and'therefore it it not practicable to raise an obstructed plunger so that it will jump'the obstruction, but the only possibility is to remove it temporar- 1 y. r I

The facility of removing the plungers ob-l viously has the additional advantage that they are readily exchanged for plungers of larger or smaller size, as required. Any irregularity which may be brought about by exchanging the plungers is readily removed by adjusting the dies 19, as described with reference to Figs. 46.

p I wish it to be understood that l do not desire to be limited to the exact details of construction shown and described for obvious IgOdlfiCfltlODs occur to a-person skilled in t e art.

In the claims afiixed to this'specification no served.

I claim:

1. In a turret for multiple punching'machines having a set of plungers, the combination with recesses in said turret of guidin bushes for said plungers each adapted to be inserted in one of said recesses, a clip adapted to hold said bush in said recess, means for means for detachably securing said clip to said turret so as to hold said bush, each bush being recessed at its upper end, a stop on said turret which is adapted to enter said recess, and a spring catch in said stop adapted to enter a recess in said plunger.

In testimony whereof I afiix m signature.

ERNST DI TRICH. 

